docs: add akhilkrishnar0 as a contributor for ideas, and review (#512)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Tetsuo Koyama <tkoyama010@gmail.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -867,6 +867,16 @@
         "review"
       ]
     },
+    {
+      "login": "akhilkrishnar0",
+      "name": "Akhil Krishna R",
+      "avatar_url": "https://avatars.githubusercontent.com/u/164136572?v=4",
+      "profile": "https://sites.google.com/res.christuniversity.in/akhilkrishnar/about?pli=1",
+      "contributions": [
+        "ideas",
+        "review"
+      ]
+    },
     {
       "login": "yngvem",
       "name": "Yngve Mardal Moe",